Keen Software House announces that the Miner Wars 2081 beta is now available on Steam in advance of the launch of this 6DOF shooter next week. The beta is open to preorder customers, and they say they say the game is now able to save games to the Steam cloud and that they are in the process of adding Steam achievements as well. Steam support is available for the game regardless of where they are purchased, and here's word how to activate your copy on Valve's service: